Many people think that if a package is damaged, it’s simply been handled roughly. And, on occasion, that’s true. But more often than not, the culprits are vibration, compression, and internal movement, and they exert their damaging effects on your shipment as it’s processed by conveyor belts and sorting equipment and loaded in and out of vehicles. When you realize what your package really goes through, you’ll look at packaging it differently.

An ISTA test environment will subject a package within a standard ground parcel delivery network to as many as 17 impacts of more than 3.5 feet or to being dropped or tipped five times. The package must also be able to withstand the weight of four to five other packages for up to two minutes, but that’s not overly aggressive, that’s Thursday if you’re shipping barcoded ground with a common carrier.

Start With The Right Box

Using a box from a previous delivery is a common packing error. Corrugated fiberboard substantially loses its structural strength after a single application – the fluted internal layer that supports the box flattens with time and is not fully restored.

For breakable objects, the perfect option is to use a new double-walled corrugated box. Look for an ECT (Edge Crush Test) rating on the box, which will indicate how much weight from stacking the box can withstand before failing. A higher ECT rating is important when your box is thrown at the bottom of a stack.

For anything that is truly high-value – such as ceramics, glassware, electronics, and antiques – double-boxing is the best method, and it is definitely worth your time. Place your item in a properly sized inner box, and put this box in a larger outer box with at least 2 inches of cushioning inside. This creates a zone of protection that absorbs shock before reaching the product.

The Two-Inch Rule and Why It Exists

Two inches of cushioning between your item and every interior wall of the box isn’t an arbitrary guideline. It’s the minimum distance needed to absorb the g-force generated when a parcel is dropped from a standard handling height.

Polyethylene foam is the strongest option for heavy fragile items – it doesn’t compress the way standard bubble wrap does under repeated stress. For lighter items, air pillows or crumpled kraft paper work well as void fill. The material matters less than the result: there should be no movement when you shake the box. If you feel or hear the contents shifting at all, add more cushioning. That movement in your hand is a preview of what happens across 500 kilometres of automated sorting.

When shipping several fragile items in one box, each piece needs to be wrapped individually before going in. Items colliding with each other cause more internal breakage than almost any other single factor. Wrap each item separately, place them so they’re not touching, and fill every gap so nothing can migrate during transit. Two wine glasses touching with no separation between them will almost certainly crack.

Sealing The Box Properly

Many people simply run a single strip of tape down the center seam and call it a day. This is not enough for cross-country shipping.

The H-taping method is the way to properly seal a box. Apply tape down the center seam and then apply a second strip of tape across each of the two side seams – the short seams at either end of the center line. It looks like an H from above. This reinforces the flaps against both vertical compression from stacking and lateral pressure from being wedged between other parcels.

Use pressure-sensitive packing tape at least two inches wide. Household tape, masking tape, and string are not appropriate for shipping parcels. They cannot withstand sustained pressure and may release in hot or cold temperature changes while in transit.

Fragile labels alone are not enough. They are very useful as a signal to handlers, but they are not a substitute for internal structural integrity. A parcel labeled fragile still goes through the same automated systems as everything else.

Getting It To The Right Courier

Once the parcel is packed correctly, the next decision is choosing a courier that can handle the rest of the journey reliably. For long-distance shipping, you want a service with tracking, clear handling standards, and experience moving goods over significant distances. When you’re ready to get your parcel sent, compare transit times and whether the service offers any form of insurance or declared-value coverage for fragile goods – this matters more than most people realise until something goes wrong.

If you’re shipping internationally, check customs declaration requirements for your destination. Some items are subject to inspection, which means a customs officer may need to open and repack your parcel. Double-boxing helps here too.

One final point on dimensional weight: well-packed fragile items tend to have a larger volume-to-weight ratio than standard goods. Carriers calculate shipping cost based on whichever is greater – actual weight or dimensional weight. Factor this into your cost estimates before you’re at the counter.

Pack for the worst leg of the journey, not the average one. That’s the standard professional logistics teams use, and it’s the right one for anything you can’t afford to have arrive broken.